Have a hum/low vibration that seems to be coming from the fresh air intake. Starts at ~55mph and gets louder as I go faster. Worse on humid days. Not really there on cold clear days. It will make this noise no matter what settings are for the AC/blower/intake vents/cabin vents/hot-cold/fan speed (including off). Not the sunroof or door seals. Sounds like it's coming from right in front of the steering wheel....

All new weather seals for the hood, too. Made no difference...

Maybe a flap valve not closing all the way?

Anyone else have this???